A lesson on Limitations

I was told from an early age that I am good at certain things, that I was good to people, that I can do certain things. It boosted my confidence and helped me get through most of my life. But the thing with this is that it created a limit around me. What do I do when I'm not good at certain things? What do I do when I fuck up with people? Or what do I do when I cannot do certain things?